Fix #6816, fix #6790

See also: #6837, #6667

* request: in the event of failure, try other IPs (#6761)

In the case where a name has multiple A/AAAA records, we should
try subsequent records instead of immediately failing when we have a
failure on the first IP address.

This significantly improves delivery success when there are network
connectivity problems affecting only IPv4 or IPv6.

* fix method call style

* request_spec: adjust test case to use Addrinfo

* request: Request/open: move private addr check to within begin/rescue

* request_spec: add case to test failover, fix exception check

* Double Addrinfo.foreach so that it correctly yields instances

Up until now, the order seemed to be in the *opposite* order,
which caused the WebUI to populate mentions in reversed order
when replying to toots local to one's instance.

* update to new version of devise_pam_authenticatable2

* fix behaviour if suffix is nil, fix environment loading, fix user email creation

* code cleanup/fix linter warning

In Devise::Mailer#email_changed, the new email might be in the email attr.
See: https://github.com/plataformatec/devise/blob/master/app/views/devise/mailer/email_changed.html.erb

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/pt_BR/

* Translated using Weblate (Spanish)

Currently translated at 99.6% (579 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/es/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/es/

* Translated using Weblate (Japanese)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ja/

* Translated using Weblate (French)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fr/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/es/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/es/

* Translated using Weblate (Indonesian)

Currently translated at 94.6% (71 of 75 strings)

Translation: Mastodon/Doorkeeper
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/doorkeeper/id/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Arabic)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ar/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Arabic)

Currently translated at 75.5% (439 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Arabic)

Currently translated at 76.2% (443 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Russian)

Currently translated at 95.8% (557 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ru/

* Translated using Weblate (Finnish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fi/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Slovak)

Currently translated at 91.7% (533 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/sk/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Spanish)

Currently translated at 99.8% (580 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/es/

* Translated using Weblate (Finnish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fi/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/es/

* Translated using Weblate (Swedish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sv/

* Translated using Weblate (Finnish)

Currently translated at 93.1% (54 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/fi/

* Translated using Weblate (Arabic)

Currently translated at 76.7% (446 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Slovak)

Currently translated at 93.2% (542 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/sk/

* Translated using Weblate (Arabic)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ar/

* Normalize translations
Ran i18n-tasks normalize && yarn manage:translations

Fix #6821

Display summary of attachments in description, and mark up content
warning if present, e.g.:

    Attached: 3 images · Content warning: Dota 2

When text is not supposed to be hidden, it looks more like:

    Attached: 3 images

    Here is the text of the toot

With #6817, multilinguagility should be assured...

Fix #6784

pretty quick fix, and with the 1 week expiration i don't think we need to be too worried about the existing files

closes #6798

Fix #6809

I don't know why, either

* Revert "Bump version to 2.3.2rc1"

This reverts commit cdf8b92fea.

* Revert "Downgrade Dockerfile to Ruby 2.4.3 on Alpine 3.6 (#6806)"

This reverts commit 0074cad44f.

* Revert "Handle Mastodon::HostValidationError when pulling remoteable assets (#6782)"

This reverts commit 4a0a19fe54.

* Revert "Correct the reference to user's password in mastodon:add_user task (#6800)"

This reverts commit 338bff8b93.

* Revert "Upgrade Paperclip to version 6.0.0 (#6754)"

This reverts commit b88fcd53f7.

Fix 6734

This will prevent, for example, `rake mastodon:redownload_avatars` from crashing when an instance is no longer responding to connection attempts, instead silently continuing as expected.

Apply "margin: 0 auto;" at line 443 to fix issue #6787

This is the first step to make Mastodon work offline. It is also required
by Chromium to trigger Web Manifest automated install prompt.

The `curl` docs are terrible. Use `-X POST -T` instead of `--data-binary`, to avoid loading entire backups into memory _before_ transferring to the warehouse, and just stream the data across as it comes in.

Signed-off-by: Marcin Mikołajczak <me@m4sk.in>

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/pt_BR/

* Translated using Weblate (Spanish)

Currently translated at 99.6% (579 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/es/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/es/

* Translated using Weblate (Japanese)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ja/

* Translated using Weblate (French)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fr/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/es/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/es/

* Translated using Weblate (Indonesian)

Currently translated at 94.6% (71 of 75 strings)

Translation: Mastodon/Doorkeeper
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/doorkeeper/id/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Arabic)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ar/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Arabic)

Currently translated at 75.5% (439 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Arabic)

Currently translated at 76.2% (443 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Russian)

Currently translated at 95.8% (557 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ru/

* Normalize translations
Ran i18n-tasks normalize && yarn manage:translations

Icon showing the state may be confusing. (does the slahed eye icon mean
the state that it is sensitive, or to mark it as sensitive?) Moreover, it
may not help for blind people.

The title will give the precise representation of the current state.

The title will give the precise representation of the current state. It
would be helpful for blind people.

Not sure how I missed that it had been using the wrong evar this entire time...

Lint is done by codeclimate

* add detailed SMTP settings setup in mastodon:setup

* add localhost SMTP settings setup in mastodon:setup

* SMTP settings setup should exit after successful delivery of test mail

avoid using JS to set height of ReactSwipeableViews component
reduce max-height of <img/> to 80% to avoid the screen covered by image